split torch.testing._internal.* and add type checking for torch.testing._internal.common_cuda (#44575)
Summary:
First step to fix https://github.com/pytorch/pytorch/issues/42969.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/44575
Reviewed By: malfet
Differential Revision: D23668740
Pulled By: walterddr
fbshipit-source-id: eeb3650b1780aaa5727b525b4e6182e1bc47a83f